CODEWITHSUNDEEP
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Justin
Justin

Reputation: 507

Is there a difference between 0 and 0x0000 in the start value of an enum?

Does this change the way the values are stored or incremented at all within the enum? If they are the same, why do people define it as 0x000?

Upvotes: 3

Views: 12129

Answers (3)

Mark B
Mark B

Reputation: 96251

There is no difference for those specific values, they're exactly the same.

But for other values, remember that prepending 0 makes it an octal constant. This means you want to avoid using values like 000, 001, 002, 010, 044, etc (in an attempt to keep the length of the constants equal).

Upvotes: 0

qwertz
qwertz

Reputation: 14792

No.
0x0000 (append as many 0's as you want) is just 0 in hexadecimal.
Sometimes all your numbers in the enum are hexadecimal. Since there are all hexadecimal your just define the first one in hexadecimal too, because it looks cleaner.

Upvotes: 3

John Kugelman
John Kugelman

Reputation: 361645

No difference, it's just a readability thing. For instance, it indicates that the enumeration values are used in some sort of binary context, such as bitflags.

enum Flags {
    FLAG_NONE   = 0x0000,
    FLAG_READ   = 0x0001,
    FLAG_WRITE  = 0x0002,
    FLAG_APPEND = 0x0004,
    FLAG_TEXT   = 0x0008,
    FLAG_MEMMAP = 0x0010
};

Upvotes: 9

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